How much storage do you need?

Add what you keep on your Mac. We total it up with typical sizes you can adjust, add the free space macOS needs, and suggest a storage size.

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What you keepQuantitySize eachGB
macOS and System DataThe system, caches, swap and snapshotsGB–
Everyday appsBrowsers, office, chat…GB–
Large apps (Office, Adobe, Final Cut…)GB–
Photos (HEIC/JPEG)iPhone photos are typically 2–5 MBMB–
RAW photosMB–
4K video (HEVC)About 170 MB a minute at 30 fpsMB–
1080p videoMB–
Downloaded musicMB–
DocumentsGB–
Xcode with simulatorsXcode, runtimes, DerivedDataGB–
Docker / containersDisk image, images and volumesGB–
Code projects with dependenciesnode_modules, build folders…GB–
Local AI models (7–8B, 4-bit)GB–
Large AI models (70B, 4-bit)GB–
GamesGB–
Virtual machinesGB–

Adds 30% for growth.

Your data–
Free space to keep–
Total you need–
Suggested storage–

At least 20 GB or 15%, so macOS can update and work smoothly. Typical sizes are averages from real-world files and can vary a lot. Change any “size each” to match yours.